Graphic user interface for a display screen



The FIGURE is a front view of a graphic user interface for a display screen showing the new design.

The broken line showings of the portions of the graphic user interface and of the portion of the display screen are for environmental purposes only and form no part of the claimed design. Unshown portions of the display screen form no part of the claimed design. 

The ornamental design for a graphic user interface for a display screen, as shown and described. 